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license plate light out

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Old 09-16-2006, 04:54 PM
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ceedee
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Default license plate light out

my license plate light is out.
and i investigated it a bit. there is a plug behind the rear bumper (got an 83 928s). i traced the plug and found out that it must have shortened. (the wires are fused together) i can't seem to find where it runs inside and into the wiring harness. it all looks so easy in the diagram but where can i find the rest of that wire? any clues?
Old 09-17-2006, 06:41 AM
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IIRC it's on the connector in the tire well.
Old 09-17-2006, 01:50 PM
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thank you. i'll check that out in a bit.
Old 09-17-2006, 06:40 PM
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Chuck Schreiber
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Dave's right,

The harness plugs in, inside the car ultimately. Distall to that, the 2 licence bulb housings connect right behind where your bumper cover says "Porsche". There is a pigtail there for the Euro light (on Euro cars light was located to the left of the licence plate) and one for the 2 licence bulbs. You may need to take off your bumper cover to get to the connecter. Aft of the connector, you have a positive lead that goes to each bulb housing (shared) and a neg lead that goes into one and onto the other.
I justi finished connecting all this as I had the rear bumper cover off for painting.

Try the connector first as Dave describes, if that does not work, you'll probably need to at least pull the bulb housings out. check them out, and possibly the bumper cover to check what's going on back there.

Good luck!
Old 11-29-2006, 08:25 PM
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Default license lights out

They are out on my customer's 1982 Porsche 928.
The brown wires are not, in fact, grounded.
I have voltage on the other leads.
I bought a set of factory repair manuals off ebay for $300.00 to fix this.
Of course, in fact, the info I need is missing from the manual. (Thanks Mr seller for not inventorying the manuals properly)
97.12? shows where all the ground locations are.
Today I drove around to a bunch of Porsche shops and finally got a copy of the ground locations. (no thanks to Champion Porsche dealer, worthless).
Ok, so .... it looks like the ground for the license is located in the right rear corner of the car under the panel. Right ?
Well I can't be sure yet because, IN FACT, section 68 is missing from my manuals as well. One repair shop said that this is a common Porsche problem..... that certain repair group information pages don't become available until the last revision of the manual ..... if EVER !?
The early manual sets were, I believe, only 5 binders, the last sets were 9 binders ?
So, In Fact, maybe my repair manuals dated 1985 or so .... never had section Group 68 despite the fact that "Interior" is mentioned in the table of contents under section 68. If anyone, In Fact, has section 68 I would like to buy a pdf copy of it ....
I need to remove the huge rear panel without destroying it. One mechanic today told me it is glued on and wished me luck.

Thanks in advance,
Bruce Toski
954 583-4191
Old 11-29-2006, 08:49 PM
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Chuck... Distal ? What the h@##is distal? medial? proximal?
anterior...posterior (ah, I know that one, "sir, bend over....")

G'luck on lights, all
Old 11-29-2006, 09:05 PM
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Bruce, the rear cover is bolted on, not glued. You need a handful of 1/4" socket extensions to get back in there. Do a search for rear bumper cover and you should get some good info. I've never taken one off myself, so I can't give you more specific help. Send a PM to "Jim Morehouse" and he can help fill in some of the blanks in your WSM.
Old 11-29-2006, 09:08 PM
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Default panels

Dave,

I think you are talking about the rear bumper.
I am referring to the interior right rear panel, which, in fact, is quite large and goes all over the darn place .....

BT
Old 11-29-2006, 10:16 PM
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Bill Ball
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Originally Posted by 72Audi
They are out on my customer's 1982 Porsche 928.
The brown wires are not, in fact, grounded.
I have voltage on the other leads.
I bought a set of factory repair manuals off ebay for $300.00 to fix this.
Of course, in fact, the info I need is missing from the manual. (Thanks Mr seller for not inventorying the manuals properly)
97.12? shows where all the ground locations are.
Today I drove around to a bunch of Porsche shops and finally got a copy of the ground locations. (no thanks to Champion Porsche dealer, worthless).
Ok, so .... it looks like the ground for the license is located in the right rear corner of the car under the panel. Right ?
Well I can't be sure yet because, IN FACT, section 68 is missing from my manuals as well. One repair shop said that this is a common Porsche problem..... that certain repair group information pages don't become available until the last revision of the manual ..... if EVER !?
The early manual sets were, I believe, only 5 binders, the last sets were 9 binders ?
So, In Fact, maybe my repair manuals dated 1985 or so .... never had section Group 68 despite the fact that "Interior" is mentioned in the table of contents under section 68. If anyone, In Fact, has section 68 I would like to buy a pdf copy of it ....
I need to remove the huge rear panel without destroying it. One mechanic today told me it is glued on and wished me luck.

Thanks in advance,
Bruce Toski
954 583-4191
If you need some quick scans of the wiring diagrams I can post relevnat ones later tonight.

What huge rear panel are you talking about...the quarter panels? They are not glued on. If you poke arund you will find a bunch of Philips screws, some slightly hidden, and a few other things to remove.
Old 11-30-2006, 02:13 AM
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Oh, THAT panel. as Bill says, it unscrews. There is a good write-up here on removing it. The main "trick" IMHO is getting the screws out of the seatbelt rosette (where the front seatbelt penetrates the quarter panel) and worse yet, getting them back in without dropping them down inside the panel.

And, as the helpful WSM's say, "Assembly is the reverse of disassembly".
Old 11-30-2006, 02:46 AM
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Bruce:

I have posted the pdf of the 82 wiring diagrams (a bit more than 2 MB) here:
http://www.norcal928.org/files/1982%...%20diagram.pdf

It appears you are on the right track as the interior lights ground under the right rear panel at the rear of the wheel arch. You may be able to get at it without fully removing the panel, but I really don't know. Try to locate the lower edge bracket screws, as shown in the link Dave provided. Check the last picture in that link to see what I mean.

Last edited by Bill Ball; 05-03-2007 at 11:17 PM.
Old 11-30-2006, 06:37 AM
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Default Thanks gents !

Wow !
You guys are sure a lot more helpful than the dealer !
Dave, that is one helluva an excellent detailed procedure (albeit not easy) to remove the rear inside panel. I would like to make a donation to its writer. It looks like Ron Beyerbach wrote the original procedure, but I can't tell who came up with the one you posted. Dave, did you put that together ?

Bill, Thanks for the excellent wiring diagrams. The downside is you helped me realize that this is another entire section that is missing from the repair manuals that I got from the schmuck off ebay.
I understand that Model 82 means .... year 82 .... which is missing in my set. I think I am going to ask for a refund. Bill .... do I have you to thank for taking all the time out to scan the diagram ? I am thinking of paypal'ing them as well and sending the bill to the jerk that sold me the incomplete manual.

Ok, so what about this section 68 Dave ?
Surely it is not as good as the procedure you posted right ?
Was section 68 only included in later repair volume sets ? If it was included from the get go then this is just another section missing out of my manual. Damn. I spent $300 for nothing.

Ok, one more thing .... despite spending several hours on the phone with Porsche NA and several at the dealer I have not been able to get an answer to a simple guestion from Porsche. Which is .....
Where can I go to view a list of Repair manuals, owners manuals, TSBs, training info, tech data etc for purchase the Porsche 928 ? They finally gave me the address to the Porsche Technical Service Information w e b s i t e.
techinfo d o t porsche d o t c o m
What do you guys make of this site ?
One can search the docs for free But ..... there is no drop down menu for the 928 !!!!!!!
and ..... it appears that one must subscribe on a yearly basis ( $5000) or pay for the documents you find .... individually ..... at $110 each !!!!!!!!!
Ok, call me crazy but this is way out of line.
This is what the industry has gone to ..... No repair manuals and a ridiculous online system that WAY OVERCHARGES ?! I used the Mercedes online repair system for a few days. Never again unless someone is holding a gun to my head. I like my 72 Audi repair manual. Real paper and real photos.

Ok, enough of my ranting for now .....

Bruce Toski
954 583-4191
Old 11-30-2006, 06:43 AM
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Bruce: You got a real old set of WSMs or an utterly incomplete set. The later sets are 9 volumes. However, as Dave mentioned they are on a CD from James Morehouse, along with a ton of other technical stuff, for under $30 I believe. I didn't scan the wiring diagrams. James did. I trust he won't mind me posting just this section as a small sample of his work.

And you're right, what Dave linked is far better than the WSM. Even at 9 volumes, they just scratch the surface. That's one of the main reasons we hang out here - tech tips galore that you'd never find otherwise.

Last edited by Bill Ball; 05-03-2007 at 11:18 PM.
Old 11-30-2006, 08:25 AM
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I have an email from Jim Morehouse. Looks like he has the Workshop Manual w PET6 parts program, complete, all years $40.00 and, separately also sells the "Porsche 928 Technical Publication CDs", 3 CD set containing around 80 manuals Porsche published to train dealer mechanics on various subsystems of the 928. $30.00

I will probably send Jim $70.00 and try to get my money back for the lame / incomplete workshop manuals that Porsche will not help me rectify....

Thanks again.
Looks like I should have just sent my money to Jim in the first place but I hate having to print out everything I need....

Bruce Toski
Old 11-30-2006, 12:41 PM
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Default Ground #2

I bought both of Jim's CD products for the 928. (don't have them yet)

I WAS able to peel back the rear interior panel enough to see that the ground wires are tight. Measured them with the ohm-meter as well. But the brown wires at the license lights are simply NOT grounded. Ok, I know it "might" be the t lead connector behind the rear bumper. I started to removed the bumper and decided not to .... In the wiring schematic the license lights are grounded at #2. Can anyone confirm that position #2 is, in fact, the one behind the passenger rear panel ?

Thanks,
Bruce Toski


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